Using Open Source for Network Security

I was just briefed that I have been selected to speak at the 2006 Enterprise Open Source Conference + Expo, June 5th and 6th in New York.  I will be speaking on using open source tools for network security.  I will also talk about freeware security tools and open standards based security tools.  If you were going to attend this anyway or if you are interested, would love to see and meet some people there.